The symptoms and control measures of celery crown rot, celery crown rot mainly damage the root neck and petiole base, and more incidence during storage after harvest. The affected part is grayish brown at the beginning, and gradually becomes dark green or black after being enlarged. The lesion has no shape, and the epidermis is intact at the early stage of the disease, causing rupture after expansion, revealing the tissue under the skin discoloration, and sometimes the second parasitic or saprophytic bacteria invade from the wound, which can rot the root crown close to the ground. The decayed parts rarely spread down or upwards.
Specific protective measures can be first selected from disease-free seeds or seeded with seeds stored for 3 years to avoid seed disease. Then, soak seeds in warm water of 48 ° C ~ 49 ° C for 30 minutes before sowing seeds. Stir the seeds so that the seeds are heated evenly, then remove them for soaking and germination, which can kill the bacteria attached to the seeds.
Before storage after harvesting, spray 1:0.5:200 Bordeaux mixture, 65% mancozeb WP 500 times solution, and 70% chlorothalonil WP 600-700 times solution.
Website URL: Symptoms of celery crown rot and control measures
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